Alan writes useful things, but this is pretty much meaningless. He says so himself: "Developer are programmers to a greater or lesser extent. Computer scientists are programmers to a greater or lesser extent."

Why put ourselves into different camps? Why can't I write poetical Rails code during the day and read the latest research papers on type theory at night? Placing ourselves in these artificial camps hinders us from exploring new places and ideas. This is why I'm tempted to call myself an artist or inventor (though to much ridicule) instead of a programmer or developer or computer scientist.